SB20260912413 - Improper locking in Linux kernel i3c driver
Published: September 12, 2026
Security Bulletin ID
SB20260912413
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper locking (CVE-ID: CVE-2026-80954)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger an unlocked dereference of a device descriptor.
The vulnerability exists due to improper locking in i3c_device_get_supported_xfer_mode() when obtaining the master controller from dev->desc without holding bus->lock. A local user can invoke i3c_device_get_supported_xfer_mode() to trigger an unlocked dereference of a device descriptor.
Remediation
Install update from vendor's website.